怎样化简(1+sin4α+cos4α)÷(1+sin4-cos4α)
<p>问题：怎样化简(1+sin4α+cos4α)÷(1+sin4-cos4α)<p>答案：↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">毛大恒的回答：<div class="content-b">网友采纳 (1+sin4α+cos4α)÷(1+sin4-cos4α) =/ =2cos2α(sin2α+cos2α)/2sin2α(sin2α+cos2α) =cot2α =(1-tan^2α)/2tanα
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